JP5863577B2 - Deposit processing equipment - Google Patents

Description

The present invention relates to a deposit processing apparatus suitable for removing process of the deposit under low-floor type conveyor belt.

  Conventionally, bulldozers and power shovels are commonly used to remove deposits that fall on the ground from belt conveyors that transport ironmaking raw materials (ores, coal, coke, auxiliary materials, etc.) at steelworks. Heavy machinery has been used as is or with some modifications. However, a general heavy machine cannot be used in order to remove deposits under a low floor belt conveyor having a height of, for example, 500 mm or less from the ground to the bottom of the belt conveyor. For this reason, an operator has entered under the low-floor type belt conveyor to manually remove deposits. Since the removal work by human power is a so-called 3K (tight, dirty, dangerous) work, it is difficult to secure workers, and there is a problem in safety and work efficiency.

  Therefore, in order to perform deposit removal work under a low floor belt conveyor without relying on human power, for example, Patent Document 1 proposes an ultra-low floor loader with a vehicle height that can enter under the low floor belt conveyor. Yes. The ultra-low floor loader described in Patent Document 1 includes a low-floor type vehicle body, a traveling body, a bucket, and the like having substantially the same height as the vehicle body. It is removed by pushing it out or housed in a bucket and removed.

JP-A-8-92992

  By the way, when pushing out a deposit using a low bed type deposit processing apparatus such as the ultra low bed loader described in Patent Document 1, an upward force (deposited on the ground) from the deposit to the bucket. Force corresponding to the back component force when cutting the deposited sediment with the bucket. If the apparatus main body of the deposit processing apparatus is lifted by this upward acting force, the deposit removing operation is hindered. Therefore, it is necessary to prevent the apparatus body from being lifted by applying a moment against the acting force to the bucket due to the weight of the apparatus body. In order to increase this moment, it is preferable to place the bucket as close to the center of gravity of the apparatus body as possible.

  However, in the ultra-low floor loader described in Patent Document 1, a bucket operation mechanism (boom, boom cylinder, bell crank, push rod, etc.) for raising and lowering and tilting the bucket is located in front of the apparatus main body (vehicle body). It was a structure to be arranged. For this reason, since the apparatus main body and the bucket are spaced apart by the amount corresponding to the bucket operating mechanism, the distance between the bucket and the center of gravity of the apparatus main body is large. Therefore, in order to prevent the apparatus body from being lifted, there has been a problem that the apparatus body must be enlarged and weighted to ensure the weight of the apparatus body. In addition, since the total length of the ultra-low floor loader is increased, the turning radius is increased, and there is a problem that workability in a narrow space under the low floor belt conveyor is deteriorated.

  Therefore, the present invention has been made in view of the above problems, and the object of the present invention is to reduce the size and weight of the apparatus by arranging the work tool and the apparatus main body close to each other, and It is to improve the workability in a narrow space by shortening the overall length of the apparatus.

In order to solve the above-mentioned problem, according to one aspect of the present invention, the steelmaking raw material has a height that allows entry into a lower space of a belt conveyor that conveys the ironmaking raw material and has dropped from the belt conveyor. In a deposit processing apparatus for processing an object, an apparatus main body, a bucket disposed in front of the apparatus main body, a pair of traveling bodies provided on both sides in the width direction of the apparatus main body, and rotating with respect to the apparatus main body A pair of arms connected to the apparatus main body and the bucket , and an elevating cylinder for rotating the arm with respect to the apparatus main body about an arm rotation axis to raise and lower the bucket; the bucket in order to tilting, and a tilt cylinder for rotating the bucket relative to the arm by using a link mechanism, the pair of arms, the one On the outside of the width direction of the running body, the apparatus is arranged along the length of the body, the rear end of the arm, by the arm rotating shaft rotatable with respect to the width direction of the side surface of the device body The arm rotation shaft is disposed behind the center of gravity of the apparatus main body, and the base end of the tilt cylinder can be rotated with respect to the arm by a first rotation shaft. A movable end of the tilt cylinder is rotatably connected to the link mechanism by a second rotating shaft, and the arm has a shape bent in a substantially Z shape, The deposit processing apparatus is provided , wherein the elevating cylinder is disposed below a rear portion, and the tilt cylinder and the link mechanism are disposed above a front portion of the arm .

The elevating cylinder may be arranged behind the center in the longitudinal direction of the arm.

  According to the above configuration, the pair of arms for operating the work tool with respect to the apparatus main body are arranged on both sides in the width direction of the pair of traveling bodies on both sides of the apparatus main body, It is not necessary to arrange a work tool operating mechanism such as an arm. Thereby, the work tool and the apparatus main body can be arranged close to each other. Furthermore, an arm rotation shaft that connects the rear end of the arm and the side surface of the apparatus main body is disposed behind the center of gravity of the apparatus main body. Therefore, when the deposit is pushed out by the work tool, a downward force due to the weight of the apparatus main body can be effectively transmitted to the work tool as a resistance against the upward force acting on the work tool from the deposit. Therefore, even if the apparatus main body is reduced in size and weight, it is possible to appropriately prevent the apparatus main body from being lifted during the extrusion operation. Furthermore, the overall length of the deposit processing apparatus can be shortened by arranging the work tool and the apparatus main body close to each other. Thereby, since the turning radius of a deposit processing apparatus can be made small, the workability | operativity in the narrow space under a belt conveyor can also be improved.

  As described above, according to the present invention, the apparatus can be reduced in size and weight by arranging the work tool and the apparatus main body close to each other. Furthermore, workability in a narrow space can be improved by shortening the overall length of the apparatus.

It is a perspective view which shows the fallen mineral processing apparatus which concerns on the 1st Embodiment of this invention. It is a side view which shows the normal attitude | position of the fallen mineral processing apparatus which concerns on the same embodiment. It is a side view which shows the raising attitude | position of the fallen mineral processing apparatus which concerns on the same embodiment. It is a side view which shows the tilt attitude | position of the fallen mineral processing apparatus which concerns on the same embodiment. It is the side view and top view which show the conventional fallen mineral processing apparatus. It is the side view and top view which show the fallen mineral processing apparatus which concerns on the same embodiment. It is a side view which simplifies and shows the fallen mineral processing apparatus which concerns on the same embodiment. It is a schematic diagram which shows the positional relationship of each site | part of the fallen mineral processing apparatus which concerns on the same embodiment. It is a schematic diagram which shows the force which acts on each site | part at the time of the extrusion operation by the fallen mineral processing apparatus which concerns on the same embodiment. It is a schematic diagram which shows the force which acts on each site | part at the time of the bucket raise by the fallen mineral processing apparatus which concerns on the same embodiment. It is a side view which simplifies and shows the conventional falling mineral processing apparatus. It is a schematic diagram which shows the positional relationship of each site | part of the conventional falling mineral processing apparatus. It is a schematic diagram which shows the force which acts on each site | part at the time of the extrusion operation by the conventional falling mineral processing apparatus. It is a schematic diagram which shows the force which acts on each site | part at the time of the bucket raise by the conventional fallen mineral processing apparatus. It is process drawing which shows the 1st extrusion operation | work of the falling-off processing method which concerns on the same embodiment. It is process drawing which shows the 1st extrusion operation | work of the falling-off processing method which concerns on the same embodiment. It is process drawing which shows the 2nd extrusion operation | work of the falling-off processing method which concerns on the same embodiment. It is process drawing which shows the 2nd extrusion operation | work of the falling-off processing method which concerns on the same embodiment. It is process drawing which shows the lifting operation | work of the falling-off processing method which concerns on the same embodiment. It is process drawing which shows the lifting operation | work of the falling-off processing method which concerns on the same embodiment. It is a perspective view which shows the fallen mineral processing apparatus which concerns on the 2nd Embodiment of this invention.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

[1. Configuration of fallen mineral processing equipment]
First, with reference to FIG. 1, the structure of the fallen mineral processing apparatus which is the deposit processing apparatus concerning the 1st Embodiment of this invention is demonstrated. FIG. 1 is a perspective view showing a fallen mineral processing apparatus 1 according to the present embodiment.

  The falling mineral processing apparatus 1 is a heavy machine for removing deposits of iron making raw materials that have fallen from the low-floor type belt conveyor that transports the iron making raw materials. Here, the ironmaking raw material includes iron ore, coal, coke, and other auxiliary raw materials. Hereinafter, the deposit of the ironmaking raw material dropped from the belt conveyor is referred to as “falling mineral”. The fallen mineral processing apparatus 1 enters the narrow space under the low-floor belt conveyor that transports the ironmaking raw material, and performs an operation of extruding or lifting the fallen mineral accumulated under the belt conveyor to remove it. Therefore, the falling mineral processing apparatus 1 is a low-floor type self-propelled heavy machine (low-floor loader) having a height H (vehicle height) that can enter under the low-floor belt conveyor. The height H of the low-floor type fallen mineral processing apparatus 1 is less than the height (for example, 500 mm) of the bottom of the low-floor type belt conveyor to be processed, for example, about 400 mm. For this reason, the height H of the fallen mineral processing apparatus 1 is significantly smaller than its width W (vehicle width) and length L (vehicle length). For example, H is less than a quarter of W, and L Less than one-sixth.

  As shown in FIG. 1, a falling mineral processing apparatus 1 includes an apparatus main body 2, a crawler 3 as a traveling body, a bucket 4 as a work tool, a bucket operation mechanism 5 as a work tool operation mechanism, and a battery 6. The control device 7 and the travel drive device 8 are mainly provided.

  The apparatus main body 2 is a box-shaped vehicle body that is disposed at the center of the falling mineral processing apparatus 1 and has a flat, substantially rectangular parallelepiped shape. Inside the apparatus main body 2, a battery 6, a control device 7, a travel drive device 8, and the like are installed.

  The crawler 3 and the traveling drive device 8 constitute a traveling device for traveling the falling mineral processing device 1. The pair of left and right crawlers 3 and 3 is an example of a traveling body for traveling the falling mineral processing apparatus 1, and is provided on both sides (left and right) of the apparatus body 2 in the width direction Y. Each crawler 3 extends in the length direction X along both side surfaces in the width direction Y of the apparatus main body 2 so as to be approximately the same height as the apparatus main body 2.

  The crawler 3 includes a drive wheel 31 rotatably provided on the rear side of the apparatus main body 2, a driven wheel (not shown) provided rotatably on the front side of the apparatus main body 2, A plurality of rolling wheels (not shown) provided on the upper and lower sides, and an endless belt-like crawler belt 32 spanned around the driving wheels 31, the driven wheels and the rolling wheels.

  The travel drive device 8 is provided in the device main body 2 and includes, for example, an electric motor or a hydraulic motor that is driven by the electric power of the battery 6, or an engine that is driven by fuel. The traveling drive device 8 generates a driving force for rotating the drive wheels 31 of the crawler 3. When the traveling drive device 8 rotates the drive wheel 31 in the forward direction or the reverse direction, the left and right crawlers 3 and 3 can circulate, and the falling mineral processing device 1 can be moved forward or backward. Further, by rotating only one of the crawlers 3, the falling mineral processing apparatus 1 can be turned to change the traveling direction.

  The bucket 4 is an example of a working tool for removing the fallen mineral, and directly contacts the fallen mineral when the fallen mineral processing apparatus 1 extrudes or lifts the fallen mineral. The bucket 4 is a box-shaped working tool whose front and upper sides are open, and is suitable not only for extruding falling minerals but also for lifting. The height of the bucket 4 is also approximately the same height as the apparatus main body 2. Moreover, the width of the bucket 4 is approximately the same as the width W of the fallen mineral processing apparatus 1. The bucket 4 is disposed in front of the apparatus main body 2 and the pair of left and right crawlers 3 and 3, and extends over the entire width direction of the falling mineral processing apparatus 1.

  The bucket operation mechanism 5 is an example of a work tool operation mechanism that operates the work tool. The bucket operation mechanism 5 in the illustrated example has a function of moving the bucket 4 up and down and tilting. A pair of left and right bucket operation mechanisms 5 and 5 are provided on both sides in the width direction Y of the falling mineral processing apparatus 1 (outside of the pair of crawlers 3 and 3 which are traveling bodies).

  The bucket operation mechanism 5 includes an arm 51, an arm rotation shaft 52, an elevating cylinder 53, a tilt cylinder 54, and a link mechanism 55.

  The arm 51 is disposed along the length direction X outside the width direction Y of the crawler 3. The rear end of the arm 51 is rotatably connected to the apparatus main body 2 by an arm rotation shaft 52. Further, the front end of the arm 51 is connected to the end portion in the width direction Y of the bucket 4 via the link mechanism 55. The length of the arm 51 is at least half of the length of the apparatus main body 2, and the rear end of the arm 51 is provided by an arm rotation shaft 52 at the rear side of the center in the length direction of the apparatus main body 2. The The arm 51 has a function of supporting the bucket 4 and rotating the bucket 4 up and down with respect to the apparatus main body 2.

  The elevating cylinder 53 has a function of rotating the arm 51 about the arm rotation shaft 52 and moving the bucket 4 up and down. The base end of the elevating cylinder 53 is rotatably connected to the apparatus main body 2 by a rotating shaft 53a, and the movable end of the elevating cylinder 53 is rotated with respect to the middle of the arm 51 by a rotating shaft 53b. It is linked movably. When the elevating cylinder 53 is extended, the arm 51 is rotated upward and the bucket 4 is raised, and when the elevating cylinder 53 is contracted, the arm 51 is rotated downward and the bucket 4 is lowered.

  The tilt cylinder 54 has a function of tilting the bucket 4 using the link mechanism 55. The base end of the tilt cylinder 54 is rotatably connected to the arm 51 by a rotation shaft 54a, and the movable end of the tilt cylinder 54 is rotatable to the link mechanism 55 by a rotation shaft 54b. It is connected. The link mechanism 55 includes three link members 55a and four rotation shafts 55b and 54b that connect the three link members 55a and the front end of the arm 51 so as to be rotatable relative to each other. As described above, the link mechanism 55 constitutes a so-called square link mechanism, but may be another type of link mechanism as long as the bucket 4 can be tilted. When the tilt cylinder 54 is extended, the bucket 4 is tilted downward by the link mechanism 55, and when the tilt cylinder 54 is contracted, the bucket 4 is tilted upward by the link mechanism 55.

  In order to install the lifting cylinder 53, the tilt cylinder 54, and the link mechanism 55 compactly outside the side surface of the crawler 3, the arm 51 has a shape bent in a substantially Z shape. A lifting cylinder 53 is disposed below the rear part of the arm 51, and a tilt cylinder 54 and a link mechanism 55 are disposed above the front part of the arm 51. With this arrangement, the space on both sides in the width direction of the crawler 3 can be effectively used to efficiently arrange each part of the bucket operation mechanism 5 and be within the range of the height Z of the apparatus main body 2. Accordingly, the height Z of the fallen mineral processing apparatus 1 can be kept low, and it is possible to enter the narrow space under the low floor belt conveyor.

  Further, the battery 6 stores electric power for driving each part of the falling mineral processing apparatus 1. The control device 7 controls the operation of each part of the fallen mineral processing device 1. By providing the control device 7 with the wireless communication device, the worker can remotely operate the falling mineral processing device 1 by using the control device 7.

  As described above, in the falling mineral processing apparatus 1 according to this embodiment, the heights of the apparatus main body 2, the crawler 3 and the bucket 4 are substantially the same, and the height H (vehicle height) of the falling mineral processing apparatus 1 is the same. The height (for example, less than 500 mm) allows entry into a narrow space under the low floor belt conveyor. For this reason, the falling mineral processing apparatus 1 performs a so-called bucket operation in which a falling floor conveyor for transporting raw materials for iron making or a narrow space under the structure enters and removes falling falling minerals from the low floor belt conveyor. be able to. Thereby, since it is not necessary for an operator to enter under the low floor type belt conveyor, it is possible to perform the falling mineral removal operation safely and efficiently.

[2. Basic operation of fallen mineral processing equipment]
Next, with reference to FIG. 2A-FIG. 2C, the basic operation | movement of the fallen mineral processing apparatus 1 of the said structure is demonstrated. 2A to 2C are side views showing a normal posture, a lifting posture, and a tilt posture of the falling mineral processing apparatus 1 according to the present embodiment.

  As shown in FIG. 2A, the falling mineral processing apparatus 1 can push out the falling mineral 10 in the normal posture in which the bucket 4 is lowered. That is, the falling mineral processing apparatus 1 can move forward or backward by operating the traveling drive apparatus 8 to rotate the drive wheel 31 of the crawler 3 and circulate the crawler belt 32. By moving the falling mineral processing apparatus 1 forward and pressing the bucket 4 against the falling mineral 10, the accumulated falling mineral 10 can be pushed out in the traveling direction.

  Moreover, as shown in FIG. 2B, the fallen mineral processing apparatus 1 can scoop and fall the fallen mineral 10 using the bucket 4 by the bucket operation mechanism 5 (lift up). That is, the falling mineral processing apparatus 1 raises the bucket 4 by moving the arm 51 upward by operating the elevating cylinder 53 in a state in which the bucket 4 is pushed into the falling mineral 10. The part 10a of the fallen mineral 10 accommodated can be lifted. The fallen mineral processing apparatus 1 can transport fallen minerals by moving forward or backward while keeping the lifted posture in which the fallen minerals 10 are lifted.

  Furthermore, as shown in FIG. 2C, the falling mineral processing apparatus 1 can drop the portion 10a of the falling falling mineral 10 by tilting the bucket 4. That is, the falling mineral processing apparatus 1 discharges the falling mineral 10 contained in the bucket 4 by operating the tilt cylinder 54 and the link mechanism 55 to rotate the bucket downward (tilting). Can be dropped to a desired position on the ground.

[3. Arrangement of work implement operation mechanism]
Next, with reference to FIG. 3, the characteristic arrangement | positioning of the work tool operation | movement mechanism (bucket operation | movement mechanism 5) in the fallen mineral processing apparatus 1 which concerns on this embodiment is demonstrated. FIG. 3A is a side view and a plan view showing a conventional fallen mineral processing apparatus 100. FIG. 3B is a side view and a plan view showing the falling mineral processing apparatus 1 according to the present embodiment.

  In the fallen mineral processing apparatus 1 according to the present embodiment, the pair of left and right bucket operation mechanisms 5 (work tool operation mechanisms) for operating the bucket 4 (work tool) is not the front side of the apparatus body 2 but the apparatus body. 2 is arranged on both sides in the width direction Y (outside of the width direction Y of the crawler 3). Accordingly, there is an effect that the falling mineral processing apparatus 1 can be reduced in size and weight, and workability in a narrow space can be improved while preventing the apparatus main body 2 from being lifted when the falling mineral 10 is pushed out. The reason for this will be described below.

  FIG. 3A shows a conventional fallen mineral processing apparatus 100 (ultra-low floor loader) described in Patent Document 1 (Japanese Patent Laid-Open No. 8-92992). In FIG. 3A, a conventional falling mineral processing apparatus 100 has a bucket operating mechanism 105 disposed on the front side of the apparatus main body 102. The bucket operation mechanism 105 includes a boom 151, a boom cylinder 152, a bell crank 153, a push rod 154, a bucket cylinder 155, and the like, and has a function of moving the bucket 104 up and down and tilting.

  As described above, when the bucket operation mechanism 105 is arranged between the apparatus main body 102 and the bucket 104, the apparatus main body 102 and the bucket 104 are separated from each other, and the distance between the two is inevitably increased. For this reason, the distance M ′ between the point of action A of the bucket 104 and the center of gravity G of the apparatus main body 102 with respect to falling minerals increases. For this reason, when extruding the fallen mineral using the conventional fallen mineral processing apparatus 100, the upward force acting on the action point A of the bucket 104 from the fallen mineral (the back portion when the fallen mineral is cut by the bucket 104). The force corresponding to the force) causes a problem that the front side of the apparatus main body 102 is lifted from the installation surface. For this reason, in the conventional falling mineral processing apparatus 100, in order to prevent the apparatus main body 102 from being lifted, the apparatus main body 102 must be increased in weight, and the apparatus becomes larger and heavier. there were. Furthermore, since the total length L ′ of the fallen mineral processing apparatus 100 becomes longer, there is a problem that the turning radius becomes larger and the workability of the fallen mineral processing apparatus 100 in a narrow space is lowered.

  On the other hand, in the falling mineral processing apparatus 1 according to the present embodiment, as shown in FIG. 3B, the bucket operating mechanism 5 for supporting and operating the bucket 4 is arranged on both sides in the width direction Y of the apparatus main body 2 (the crawler 3 In the width direction Y), and no mechanism is arranged in front of the apparatus main body 2. The bucket operation mechanism 5 includes the above-described arm 51, arm rotation shaft 52, elevating cylinder 53, tilt cylinder 54, link mechanism 55, and the like. Each of these components of the bucket operation mechanism 5 is disposed on both sides of the apparatus main body 2, that is, on the outer side in the width direction Y of the crawler 3 (running body). In particular, the pair of left and right arms 51, 51 are arranged outside the width direction Y of the pair of crawlers 3, 3 so as to extend along the length direction X of the apparatus main body 2.

  With the arrangement of the bucket operation mechanism 5, the bucket 4 can be as close as possible to the apparatus main body 2, and the bucket 4 and the apparatus main body 2 can be arranged close to each other. At this time, the front surface of the apparatus main body 2 and the back surface of the bucket 4 are disposed in close proximity to each other, and no member is disposed therebetween. In addition, according to the bucket operation mechanism 5 according to the present embodiment, the bucket 4 can be raised and lowered and tilted without inferior to the bucket operation mechanism 105 of the conventional falling mineral processing apparatus 100.

  In the falling mineral processing apparatus 1 according to the present embodiment, the bucket 4 and the apparatus main body 2 can be disposed close to each other by the characteristic arrangement of the bucket operation mechanism 5 as described above. For this reason, the distance M between the action point A of the bucket 4 and the center of gravity G of the apparatus main body 2 with respect to the fallen mineral 10 can be shortened to the maximum, which is much larger than the distance M ′ of the conventional fallen mineral processing apparatus 100. It can be shortened (M <M ′). Therefore, the downward moment acting on the action point A of the bucket 4 can be maximized by the weight of the apparatus main body 2. Therefore, even when an upward force (a force corresponding to the back component force) is applied from the falling mineral 10 to the action point A of the bucket 4 during extrusion of the falling mineral 10, Since a large downward moment against the upward acting force can be transmitted to the bucket 4, it is possible to appropriately prevent the apparatus body 2 from being lifted.

  Therefore, even the relatively light and small falling mineral processing apparatus 1 can resist the lifting force of the apparatus body 2 during the falling operation of the falling mineral 10 and hinder the removal work of the falling mineral 10. There is nothing to do. Therefore, the falling mineral processing apparatus 1 can be reduced in size and weight, and the working capacity of the falling mineral processing apparatus 1 can be improved. Further, since the overall length L of the fallen mineral processing apparatus 1 can be shortened (L <L ′) compared to the overall length L ′ of the conventional fallen mineral treatment apparatus 100, the turning radius of the fallen mineral treatment apparatus 1 can be reduced, and the low floor type Workability in a narrow space under the belt conveyor can be improved.

[4. Arrangement of arm rotation axis]
Next, the characteristic arrangement of the fulcrum position (arm rotation shaft 52) of the arm 51 in the falling mineral processing apparatus 1 according to the present embodiment will be described with reference to FIGS.

  In the fallen mineral processing apparatus 1 according to the present embodiment, the arm rotation shaft 52 (arm fulcrum O) serving as a fulcrum for the rotation of the arm 51 is rearward in the length direction X from the position of the center of gravity G of the apparatus body 2. It is characterized by being arranged on the side. As shown in FIG. 3B, the arm rotation shaft 52 pivotally supports the rear end of the arm 51 and serves as the rotation center of the arm 51. Is also arranged on the rear side.

  Thereby, compared with the case where the arm rotation shaft 52 (arm fulcrum O) is disposed in front of the center of gravity G of the apparatus main body 2, the arm rotating shaft 52 acts downward on the operating point A of the bucket 4 due to the weight of the apparatus main body 2. The force Wa can be increased. Therefore, even if the upward force acts on the bucket 4 from the fallen mineral 10 when the fallen mineral 10 is pushed out by the fallen mineral processing apparatus 1, a larger downward moment is applied to the bucket due to the weight of the apparatus body 2. Therefore, it is possible to more reliably prevent the apparatus body 2 from being lifted. The reason for this will be described below.

(A) When the arm fulcrum O is behind the center of gravity G First, referring to FIGS. 4 and 5, the fulcrum O of the arm 51 is the apparatus main body 2 as in the falling mineral processing apparatus 1 according to the present embodiment. Consider the case where it is located behind the center of gravity G. FIG. 4A is a simplified side view showing the fallen mineral processing apparatus 1 according to the present embodiment, and FIG. 4B is a schematic view showing the positional relationship of each part of the fallen mineral processing apparatus 1.

  As shown in FIG. 4A, in the falling mineral processing apparatus 1 according to this embodiment, the arm rotation shaft 52 (arm fulcrum O) is disposed behind the center of gravity G of the apparatus main body 2. In this case, the positional relationship of each part of the fallen mineral processing apparatus 1 is as shown in FIG. 4B. The symbols used in the description of the examples of FIGS. 4 and 5 are defined as follows.

G: Center of gravity of the apparatus body 2 O: Arm fulcrum (arm rotation shaft 52)
F: Front end of the crawler 3 R: Rear end of the crawler 3 A: Point of action of the bucket 4 on the falling mineral 10 during the falling ore treatment L1: Distance between the arm fulcrum O and the crawler rear end R L2: Center of gravity G and arm fulcrum O L3: Distance between crawler front end F and center of gravity G La: Distance between bucket action point A and arm fulcrum O L = L1 + L2 + L3
W: Weight of the fallen mineral processing apparatus 1 (force acting on the center of gravity G)
Wa: Force acting on the bucket action point A Wf: Force acting on the crawler front end F Wr: Force acting on the crawler rear end R

  Consider the force acting on each part of the fallen mineral processing apparatus 1 when the fallen mineral processing apparatus 1 extrudes the fallen mineral 10 under the conditions shown in FIGS. 4A and 4B. It is assumed that the weight of the entire apparatus is supported by the bucket 4 and the rear end R of the crawler 3 to the limit. In this case, as shown in FIG. 5A, the force Wa acting on the bucket acting point A and the force Wr acting on the crawler rear end R are expressed by the following equations (1) and (2).

Wa = W · (L1 + L2) / (L1 + La) (1)
Wr = W · (La−L2) / (L1 + La) (2)

  Next, the force which acts on each part when the bucket 4 of the fallen mineral processing apparatus 1 is lifted (lifted up) will be considered. It is assumed that the distributed load of the entire crawler 3 is a concentrated load on the crawler front end F and the rear end R. In this case, as shown in FIG. 5B, the force Wa acting on the bucket acting point A is substantially equal to the load of the falling mineral 10 in the bucket 4, and the force Wf acting on the crawler front end F and the crawler rear end R are applied. The acting force Wr is expressed by the following formulas (3) and (4).

Wf = (La · Wa + L1 · Wa + L1 · W + L2 · W) / L (3)
Wr = (L2 / Wa + L3 / Wa + L3 / W-La / Wa) / L (4)

(B) When the arm fulcrum O is ahead of the center of gravity G Next, referring to FIGS. 6 and 7, as a comparative example of this embodiment, the fulcrum O of the arm 51 is more than the center of gravity G of the apparatus body 2. Consider the case of rearward positioning. This case corresponds to the conventional fallen mineral processing apparatus 100 described above. 6A is a side view schematically showing the fallen mineral processing apparatus 100 in which the arm fulcrum O is ahead of the center of gravity G, and FIG. 6B is a schematic diagram showing the positional relationship of each part of the fallen mineral processing apparatus 100. It is.

  As shown in FIG. 6A, in the falling mineral processing apparatus 100, the arm fulcrum O is disposed in front of the center of gravity G of the apparatus main body 2. In this case, the positional relationship of each part of the fallen mineral processing apparatus 100 is as shown in FIG. 6B. The symbols used in the description of the examples of FIGS. 6 and 7 are defined as follows.

G: Center of gravity of the apparatus main body 102 O: Arm fulcrum F: Front end of the crawler 103 R: Rear end of the crawler 103 A: Point of action of the bucket 104 against the falling mineral 10 during the falling ore processing L1: Center of gravity G and the rear end R of the crawler L2: Distance between arm fulcrum O and center of gravity G L3: Distance between crawler front end F and arm fulcrum O La: Distance between bucket action point A and arm fulcrum O L = L1 + L2 + L3
W: Weight of the fallen mineral processing apparatus 100 (force acting on the center of gravity G)
Wa: Force acting on the bucket action point A Wf: Force acting on the crawler front end F Wr: Force acting on the crawler rear end R

  Consider the force acting on each part of the fallen mineral processing apparatus 100 when the fallen mineral processing apparatus 100 extrudes the fallen mineral 10 under the conditions shown in FIGS. 6A and 6B. As in the above, it is assumed that the bucket 4 and the rear end R of the crawler 3 support the weight of the entire apparatus in the limit. In this case, as shown in FIG. 7A, the force Wa acting on the bucket acting point A and the force Wr acting on the crawler rear end R are expressed by the following equations (5) and (6).

Wa = W · L1 / (L1 + L2 + La) (5)
Wr = W · (L2 + La) / (L1 + L2 + La) (6)

  Next, the force which acts on each site | part when the bucket 4 of the falling mineral processing apparatus 100 is raised (lifted up) is considered. The distributed load of the entire crawler 103 is assumed as a concentrated load on the crawler front end F and rear end R. In this case, as shown in FIG. 7B, the force Wa acting on the bucket action point A is substantially equal to the load of the falling mineral 10 in the bucket 104, and the force Wf acting on the crawler front end F and the crawler rear end R are applied. The acting force Wr is expressed by the following formulas (7) and (8).

Wf = (La · Wa + L1 · Wa + L2 · Wa + L1 · W) / L (7)
Wr = (L2 / W + L3 / W + L3 / Wa-La / Wa) / L (8)

(C) Comparative study of the above (A) and (B) If the above equations (1) and (5) are compared, (A) the case where the arm fulcrum O is behind the center of gravity G is (B) It can be seen that the downward force Wa with respect to the point of action A of the bucket 4 can be made larger than when the arm fulcrum O is ahead of the center of gravity G. This downward force Wa is a force that acts on the bucket 4 due to the weight of the apparatus body 2, and opposes an upward force that acts on the bucket 4 from the falling mineral 10 when the falling mineral 10 is pushed out by the falling mineral processing apparatus 1. Is. As the downward force Wa increases, the apparatus body 2 can be prevented from being lifted during the extrusion operation. Accordingly, in the falling mineral processing apparatus 1 having the same overall length L, from the viewpoint of preventing the apparatus body 2 from being lifted during the falling operation of the falling mineral 10, the arm fulcrum O (arm rotation) as in the case of (A) above. It can be said that the shaft 52) is preferably arranged behind the center of gravity G.

  Further, according to the above formula (1), as L1 + L2 is larger and La is smaller, the downward force Wa acting on the action point A of the bucket 4 becomes larger. If L1 + L2 is large and La is small, the center of gravity of the bucket 4 and the apparatus main body 2 will be close to each other. Therefore, in the falling mineral processing apparatus 1 having the same weight, from the viewpoint of preventing the apparatus main body 2 from being lifted when the falling mineral 10 is pushed out, it is preferable that the gravity center G of the apparatus main body 2 and the bucket 4 are arranged close to each other. Moreover, it can be said that the length La of the arm 51 is preferably shorter. Thereby, it can be said that the downward force Wa can be increased to prevent the apparatus main body 2 from being lifted during the extrusion operation.

  If the positional relationship between the center of gravity G and the arm fulcrum O and the arm length La are designed only by increasing the downward force Wa acting on the bucket 4, the bucket as shown in FIGS. 5B and 7B. When 4 is lifted up, the rear side of the apparatus body 2 may be lifted (see the above formulas (4) and (8)). Therefore, it is preferable to adjust the positional relationship between the center of gravity G and the arm fulcrum O and the arm length La within a range in which the rear side lift can be prevented.

[5. Characteristic arrangement of lifting cylinder]
Next, the characteristic arrangement | positioning of the raising / lowering cylinder 53 in the fallen mineral processing apparatus 1 which concerns on this embodiment is demonstrated.

  In the fallen mineral processing apparatus 1 according to the present embodiment, the lifting cylinder 53 that rotates the arm 51 to move the bucket 4 up and down is in front of the arm rotation shaft 52 and is in the longitudinal center of the arm 51. It is characterized by being arranged rearward. As shown in FIG. 1 and FIG. 3B, for example, the movable end of the lifting cylinder 53 is connected to a part on the rear side of the center in the length direction X of the arm 51 by a rotating shaft 53 b. Is connected to the side surface of the apparatus main body 2 on the rear side of the rotation shaft 53b by the rotation shaft 53a.

  In this way, by disposing the lifting cylinder 53 on the rear side of the arm 51, the amount of rotation of the arm 51 can be increased by using the lifting cylinder 53 with the same stroke as compared with the case where the lifting cylinder 53 is disposed on the front side of the arm 51. Can be increased, and the amount of lifting of the bucket 4 can be increased. Therefore, it is possible to employ the elevating cylinder 53 with a short stroke suitable for the falling mineral processing apparatus 1 of a compact machine body.

  In the fallen mineral processing apparatus 1, the lift-up height of the bucket 4 by the bucket operation mechanism 5 may be low enough to tilt the bucket 4 and discharge the fallen mineral 10. That is, in the low floor type falling mineral processing apparatus 1, the size of the bucket 4 is limited by the height (vehicle height) H of the falling mineral processing apparatus 1. Accordingly, the lift-up height of the bucket 4 is sufficient to be slightly higher than the vehicle height H. Therefore, since the stroke of the elevating cylinder 53 for lifting the bucket 4 can be shortened, there is no problem in workability even if the elevating cylinder 53 with a short stroke length is employed as described above.

[6. Deposit processing method]
Next, referring to FIG. 8 to FIG. 10, using the falling mineral processing apparatus 1 according to the present embodiment, the falling mineral processing method (sediment processing method) for removing the falling mineral 10 under the low floor belt conveyor. Will be described. 8-10 is process drawing which shows the falling ore processing method which concerns on this embodiment.

  As shown in FIGS. 8 to 10, the low-floor type belt conveyor 11 is an apparatus for transporting minerals 12 such as iron ore and coal. The belt conveyor 11 includes a belt 13 on which the mineral 12 is placed, a plurality of carrier rollers 14 provided on the bottom surface of the upper belt 13 on which the mineral 12 is placed, and a return side on which the mineral 12 is not placed. A return roller 15 provided on the bottom surface of the (lower) belt 13 and a gantry 16 that supports these parts at a predetermined height from the ground 17 are provided. In the lower space 18 of the low-floor type belt conveyor 11, the mineral 12 that has dropped from the belt conveyor 11 (that is, the falling mineral 10) accumulates. In order to remove the fallen mineral 10 accumulated in the lower space 18 of the low floor belt conveyor 11, the fallen mineral processing apparatus 1 described above is used.

  The fallen mineral processing apparatus 1 according to the present embodiment performs the removal process of the fallen mineral 10 by prioritizing the extrusion work (see FIGS. 8 and 9) over the lifting work (see FIG. 10) of the fallen mineral 10. In the extruding operation, falling minerals 10 having a capacity equal to or larger than the capacity of the bucket 4 can be collectively processed, so that the removing operation is efficient.

(1) First extrusion operation (first step)
FIG. 8 shows a first extrusion operation (first step) in which all of the fallen minerals 10 are pushed out from the lower space 18 of the belt conveyor 11 at once over the width of the bucket 4 by the fallen mineral processing apparatus 1. As shown in FIG. 8, consider a case where a place where the falling mineral 10 exists in the lower space 18 of the belt conveyor 11 (hereinafter, a falling place) is an extrudable place. Here, the extrudable location is a location where the fallen mineral 10 can be extruded from one side of the belt conveyor 11 to the other side using the fallen mineral processing apparatus 1. For example, a place where there is no structure (see FIG. 10) in a place where the falling mineral 10 is pushed out (the other side of the belt conveyor 11) is an extrudable place.

  When the falling-off portion is an extrudable portion, as shown in FIG. 8, the first falling operation is performed by the falling- mineral processing apparatus 1 (first step). Specifically, first, the falling mineral processing apparatus 1 is disposed on one side of the belt conveyor 11, and the bucket 4 is positioned at the lowest height (first height) directly above the ground 17. Next, as shown in FIG. 8A, the falling mineral processing apparatus 1 is advanced by the crawler 3, and the bucket 4 is brought into contact with the bottom of the falling mineral 10 while moving the bucket 4 along the ground 17 in the horizontal direction. Then, as shown in FIG. 8B, the falling mineral 10 is removed from the lower space 18 of the belt conveyor 11 by pushing out all of the falling mineral 10 to the other side of the belt conveyor 11 using the bucket 4. Thus, in the first extrusion operation, the fallen mineral 10 is divided in the vicinity of the boundary between the ground 17 and the fallen mineral 10, and almost all of the fallen mineral 10 on the ground 17 in the lower space 18 is pushed out at a time.

  However, when the falling mineral 10 has a large viscosity or specific gravity, or when the falling mineral 10 is solidified firmly, the extrusion load of the first extrusion operation becomes high. In some cases, it is not possible to extrude all falling minerals 10 at once. Thus, when the falling load of the fallen mineral 10 is high, when the fallen mineral 10 cannot be extruded by the 1st extrusion operation (1st process) shown in FIG. 8, it demonstrates to FIG. 9 demonstrated next. Perform the extrusion operation shown.

(2) Second extrusion operation (second step)
FIG. 9 shows a second extrusion operation (second step) in which the fallen mineral processing apparatus 1 pushes the fallen mineral 10 from the lower space 18 of the belt conveyor 11 stepwise in the height direction. When the falling mineral 10 cannot be extruded by the first extrusion operation, as shown in FIG. 9, the falling mineral processing apparatus 1 slightly raises the bucket 4 to lower the extrusion load, and then 2 extrusion operation is performed.

  Specifically, first, as shown in FIG. 9A, the falling mineral processing apparatus 1 is disposed on one side of the belt conveyor 11, and the bucket operation mechanism 5 causes the bucket 4 to move from the ground 17 to a height h ( 2nd height). The second height h is appropriately selected according to the viscosity, specific gravity, solidified state, etc. of the fallen mineral 10, but is several tens of centimeters, for example. Next, the falling mineral processing apparatus 1 is advanced by the crawler 3, and the bucket 4 is brought into contact with the intermediate portion in the height direction of the falling mineral 10 while moving the bucket 4 in the horizontal direction with the second height h. Then, as shown in FIG. 9B, the bucket 4 is used to push out the upper part of the fallen mineral 10 (the fallen mineral 10 above the contact position of the bucket 4) to the other side of the belt conveyor 11. The falling mineral 10 is removed from the lower space 18 of the conveyor 11.

  At this time, when the extrusion load is still high and the fallen mineral 10 cannot be extruded, the bucket 4 is raised to a third height higher than the second height, and then the second extrusion is performed. Just try the work. If the position of the bucket 4 is raised, the cross-sectional area of the fallen mineral 10 divided in the horizontal direction by the bucket 4 is also reduced, so that the extrusion load can be reduced.

  As described above, in the second extruding operation, by raising the bucket 4, the extruding load of the falling mineral 10 is reduced, and the falling mineral 10 is divided at a midway position in the height direction of the falling mineral 10. Extrude 10 upper part. Thereafter, when removing the lower part of the remaining fallen mineral, the bucket 4 is lowered to the vicinity of the ground 17 and the extrusion operation is performed in the same manner as the first extrusion operation. Thus, by performing the extrusion operation stepwise in the height direction of the fallen mineral 10, it is possible to efficiently remove the fallen mineral 10 even when the extrusion load of the fallen mineral 10 is high.

  In the second extrusion operation, the example in which the falling mineral 10 is divided into two stages in the height direction and the extrusion operation is performed twice has been described. However, the falling mineral 10 is divided into three or more stages in the height direction. You may divide and perform the extrusion operation 3 times.

(3) Lifting work (third process)
FIG. 10 shows a lifting operation (third step) in which a part of the fallen mineral 10 is lifted and removed from the lower space 18 of the belt conveyor 11 by the fallen mineral processing apparatus 1.

  As shown in FIG. 10, when there is a structure 19 adjacent to the belt conveyor 11 at the falling site, there is no space for the extrusion destination, so the first and second extrusion operations cannot be performed. . Moreover, since a large shearing force is required at the time of extruding the falling mineral 10 by the bucket 4 and the extrusion load becomes large, the falling mineral 10 may not be extruded even by the second extrusion operation. In these cases, as shown in FIG. 10, a lifting operation for lifting and removing a part 10 a of the fallen mineral 10 using the bucket 4 is performed.

  Specifically, the falling mineral processing apparatus 1 is disposed on one side of the belt conveyor 11, and the bucket 4 is positioned at the lowest height (first height) directly above the ground 17. Next, as shown in FIG. 10A, the falling mineral processing apparatus 1 is advanced by the crawler 3, and the bucket 4 is brought into contact with the falling mineral 10 while moving the bucket 4 in the horizontal direction along the ground 17. At this time, the height of the bucket 4 may be the lowest height (first height) immediately above the ground 17 or may be a height (second height) raised to some extent from the ground 17. There may be. By bringing the bucket 4 into contact with the fallen mineral 10, a part 10 a of the fallen mineral 10 is accommodated in the bucket 4. Thereafter, as shown in FIG. 10B, the falling mineral processing apparatus 1 is moved backward by the crawler 3, so that a part 10 a of the falling mineral 10 accommodated in the bucket 4 is scooped from the lower space 18 of the belt conveyor 11. Discharge.

  Even if the falling mineral 10 cannot be pushed out due to the structure 19 or an excessive extrusion load due to the lifting operation, the falling mineral 10 corresponding to the capacity of the bucket 4 is removed from the lower space 18 of the belt conveyor 11. It is possible.

[7. Summary]
Heretofore, the falling mineral processing apparatus 1 according to the present embodiment and the falling mineral processing method using the same have been described in detail. According to the present embodiment, the fallen mineral processing apparatus 1 is a heavy machine having a low vehicle height H that can enter the lower space 18 of the low floor belt conveyor 11. Work can be performed properly. At this time, the falling mineral processing apparatus 1 can perform the raising / lowering operation and the tilting operation of the bucket 4 without any trouble by the bucket operation mechanism 5 having the characteristic structure.

  Moreover, in the fallen mineral processing apparatus 1, the bucket 4 and the apparatus main body 2 are closely arranged by arranging the bucket operation mechanisms 5 such as the arms 51 on both the left and right sides of the apparatus main body 2 as described above. Further, the arm rotation shaft 52 (arm fulcrum O) is disposed behind the center of gravity G of the apparatus body 2. With this arrangement, when the falling mineral 10 is horizontally divided by the bucket 4 in the extruding operation of the falling mineral 10, even if the bucket 4 receives an upward force (back splitting force), it depends on the weight of the apparatus main body 2. The downward drag can be effectively transmitted to the bucket 4. Therefore, even if the falling mineral processing apparatus 1 is relatively small and light, the apparatus body 2 can be prevented from being lifted up during the extrusion operation. Therefore, the work capability of the falling mineral processing apparatus 1 with the same body weight can be improved.

  Further, the lifting cylinder 53 is disposed on the rear side of the center of the arm 51. Thereby, in the same raising / lowering cylinder stroke, the raising / lowering amount of the bucket 4 can be ensured and the raising / lowering cylinder 53 of the short stroke length suitable for the falling mineral processing apparatus 1 of a compact body can be employ | adopted.

  In addition, according to the falling mineral processing method according to the present embodiment, the first and second extrusion operations and the waiting operation are properly used according to the environment around the falling site, the solidified state of the falling mineral 10, and the like. Thus, the falling mineral 10 can be efficiently and reliably removed. Moreover, since the fallen mineral processing apparatus 1 removes the fallen mineral 10, it is not necessary for the worker to perform the removal work manually, so that the removal work can be performed safely and efficiently, and labor saving and work time of the worker are achieved. Can be shortened.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

  For example, in the said embodiment, although the crawler 3 was used as a running body of the fallen mineral processing apparatus 1, this invention is not limited to this example. The traveling body may be any mechanism that can move the deposit processing apparatus forward and backward at least, and for example, a plurality of tires may be used.

  Moreover, in the said embodiment, although the bucket 4 was used as a working tool of the fallen mineral processing apparatus 1, this invention is not limited to this example. The working tool may be any member that can at least extrude the fallen mineral, and for example, an extruding blade such as the dozer 9 shown in FIG. 11 may be used.

DESCRIPTION OF SYMBOLS 1 Fallen mineral processing apparatus 2 Apparatus main body 3 Crawler 4 Bucket 5 Bucket operation mechanism 6 Battery 7 Control apparatus 8 Travel drive device 9 Dozer 10 Fallen mineral 11 Belt conveyor 12 Mineral 17 Ground 18 Lower space 19 Structure 51 Arm 52 Arm rotation shaft 53 Lift cylinder 54 Tilt cylinder 55 Link mechanism

Claims (2)

In a deposit processing apparatus that has a height that allows entry into a lower space of a belt conveyor that conveys the raw material for iron making, and that processes the deposit of the raw material for iron making that has dropped from the belt conveyor,
The device body;
A bucket disposed in front of the apparatus body;
A pair of traveling bodies provided on both sides in the width direction of the apparatus body;
A pair of arms provided rotatably with respect to the apparatus main body, and connecting the apparatus main body and the bucket ;
An elevating cylinder for rotating the arm with respect to the apparatus main body around an arm rotation axis in order to raise and lower the bucket;
A tilt cylinder that rotates the bucket with respect to the arm using a link mechanism to tilt the bucket;
With
The pair of arms are arranged along the length direction of the apparatus main body on the outer side in the width direction of the pair of traveling bodies,
The rear end of the arm is rotatably connected with respect to the width direction of the side surface of the apparatus main body by the arm rotating shaft,
The arm rotation shaft is disposed behind the center of gravity of the apparatus main body ,
A base end of the tilt cylinder is rotatably connected to the arm by a first rotation shaft, and a movable end of the tilt cylinder is rotated with respect to the link mechanism by a second rotation shaft. Concatenated,
The arm has a shape bent in a substantially Z shape, the lifting cylinder is disposed below the rear part of the arm, and the tilt cylinder and the link mechanism are disposed above the front part of the arm. A deposit processing apparatus. The deposit processing apparatus according to claim 1, wherein the elevating cylinder is disposed rearward of the longitudinal center of the arm.

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